What kind of node is this?
Nodes can be combined to a Node Group, the parameters you listed are part of a Group Input in the old (pre 2.67) style Group Interface.

Each important in and output of a group of nodes can be wired to the group in- and output nodes to make them accessible when the group is collapsed.

The new style looks like:



Single Node nonsense example

You can collapse the view of a node group using the up-arrow button from the menu header, and expand it by clicking the icon right to the nodes title.